ps series - versa · pdf file12345 10 2030405075 100 125150 200 ... flange dimensions in...

ISO 9001-2008

LPG Industry

Ship Yards

Petrochemical Industry Chemical Industry

Oil Industry

Pharmacautical Industry

Sectors

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Self- priming

High pressure at low capasity

Liquefied gas handling

High resistant materials

Performance curve characteristic

High efficiency

Low NPSH value

Modular hydraulic system

Ability to pump vapour laden

liquides (up to 50%)

VERSA pump is a self-priming side channel pump capable of handling gas

along with the medium and operates at a low noise level. PS pumps are used for

problem-free pumping of clean liquids at unfavourable suction side conditions.

They are also very suitable for positive suction heads below 0,5m. PS pumps

provide the most appropriate solutions for liquefied gases, liquids under vapour

pressure, refrigerants and especially PS applications.

Side channel designs fill the hydraulic performance void between positive

displacement pumps and centrifugal pumps. Fully open ìstarî impellers interact

with the side channel casing creating an intense transfer of energy to the pumped

liquid or liquid / gas mixture. The corresponding pressure increase (pump head)

equals 5 to 10 times the amount generated by a similar size centrifugal pump at

the same RPM.

PSD MODEL

PSC MODEL

PSV MODEL

Features : Technical Data :

3Capasity: 0.5 - 35 m/h

Head: max. 35 bar

Casing pressure: max. 40 bar

Speed: max. 1750 d/d (60 Hz)

Working temperature: max. 220C

Flange connections: DIN2501 - ANSI 150 & 300 / PN40

The solution for critical conditionsThe solution for critical conditionsThe solution for critical conditions

Side Channel Pumps

The design of the side channel pump allows for the transfer of liquid-gas mixture with up to 50% vapor; therefore

eliminating possible air or vapor locking that can occur in other pump designs. A special suction impeller lowers the

NPSH requirement for the pump.

The side-channel pump design is similar to a regenerative turbine in that the impeller makes regenerative passes

through the liquid. However, the actual design of the impeller and casing as well as the principles of operation differ

greatly. The side-channel pump has a channel only in the discharge stage casing (A) and a flat surface which is flush with

the impeller on the suction stage casing (B). A star-shaped impeller (C) is keyed to the shaft and is axially balanced

through equalization holes (D) in the hub of the impeller.

The liquid or liquid/vapor mixture enters each stage of the pump through the inlet port (E). Once the pump is initially

filled with liquid, the pump will provide a siphoning effect at the inlet port. The effect is similar to what happens in water

ring pumps. The water remaining in the pump casing forms a type of water ring with a free surface. A venturi effect is

created by the rotation of the impeller and the free surface of the water, thus pulling the liquid into the casing.

After the liquid is pulled through the inlet port, it is forced to the outer periphery of the impeller blade by centrifugal

action. It is through this centrifugal action that the liquid is accelerated and forced into the side channel. The liquid then

flows along the semicircular contour of the side channel from the outermost point to the innermost point until once

again it is accelerated by the impeller blade.

F

GH C

D E

A

Vapor Liquid

Vapor andLiquidMixture

Principle of Side Channel Operation

B

A

B

C

D

E

F

G

H

Item Description

Discharge Casing

Suction Casing

Vane Wheel Impeller

Equalization Holes

Liquid Inlet

Liquid Outlet

Mini Channel

Vapor Balance Outlet

Working Principle of Pump

1 2 3 4 5 10 20 30 40 50 75 100

125

150

200

Performance Curves

350

300

250

200

150

100

50

0.1 .2 .3 .4 .5 .6 .7.8.91.0 2 3 4 5 6 7 8 910 20 30 40 50 6070

H(f

t)

H(m

)

1 2 3 4 5 10 20 30 40 50 75 100

125

150

200

350

300

250

200

150

100

50

1200

1100

1000

900

800

700

600

500

400

300

200

100

10

00

20

00

30

00

40

00

50

00

60

00

GPM

H(f

t)

H(m

)

10

00

20

00

30

00

GPM

40

00

50

00

60

00

1200

1100

1000

900

800

700

600

500

400

300

200

100

0.1 .2 .3 .4 .5 .6 .7.8.91.0 2 3 4 5 6 7 8 910 20 30 40 50 6070

PS Series

ANSI 150 & 300 Flange / DIN EN 1092 & DIN 2501 PN40 Flange

SERIES

1 - 2 - 3 - 4 - 5 - 6 - 7 - 8

1000 2000 3000 4000 5000 6000

Number of Stages

Inlet Flange

Outlet Flange

Inlet - Outlet Flanges for PSD & PSV

Speed (50 Hz) / Speed (60Hz)

Maximum Working Pressure, Bar

Differantial Range Head ft [m]

Minimum Temperature °C (°F)

Maximum Temperature °C (°F)

NPSH ft (m)

Maximum Viscosity cSt (SSU)

Maximum Proportion of

Gas Allowable

50 (15) 690 (210)- 65 (20) 1050 (320)- 30 (10) 820 (250)- 30 (10) 805 (245)- 30 (10) 950 (290)- 30 (10) 1150 (350)-

1½ (DN40) 2½ (DN65) 2½ (DN65) 3 (DN80) 4 (DN100) 4 (DN100)

¾ (DN20) 1 (DN32)¼ 1¼ (DN32) 1½ (DN40) 2 (DN50) 2½ (DN65)

¾ (DN20) 1¼ (DN32) 1¼ (DN32) 1½ (DN40) 2 (DN50) 2½ (DN65)

1450 / 1750

35 Bar (510)

-40° (-40°)

220° (430°)

230 (1050)

50 %

1.6 (.5) 13 (4)- 2 (.6) 3.3 (1)- 1.6 (.5) 6.6 (2)- 1.3 (.4) 8.2 (2.5)- 1.3 (.4) 12 (3.5)- 4.6 (1.4) 8.2 (2.5)-

Connection Norms

GG25 (Cast Iron) / GGG50 (Ductile Iron) / GSC25N (Steel) / AISI 316 (Stainless Steel)Casing Material Options

Alloyed Bronze / Bronze RG7 / AISI 316 Stainless SteelImpeller Material Options

Mechanical seal / Cartridge Mechanical seal / Cartridge double Mechanical seal / Packing glandShaft Sealing Options

1450 rpm (1750 rpm / 60Hz)Pump rpm

3 3Max: 35 m /h (42 m /h / 60Hz)Capacity

Likquid Sensor (Liquid Level Switch) / Collector / Reducer / Exproof Coupling / By-Pass ValveAccessories

SIC-Car-Viton / SIC-SIC-Kalrez / SIC-SIC-TeflonMechanical Seal Material Options

3M /hr 1450 d/d (50 Hz) 3M /hr 1750 d/d (60 Hz)

Pump Models and Technical Spesifications

Side Channel Pumps - type PSC

Pumps of the series PSC are horizontal and self-priming, side channel pumps with

a NPSH inducer stage suitable for handling liquids which do not contain solid or

abrasive matter. The NPSH inducer stage allows the pump to operate on the suction

side under unfavourable conditions and at positive suction heads lower than 0.5 m.

The range comprises of six sizes each with 1 to 8 hydraulic stages whereby an

optimum rating is obtained, ensuring the pump selected meets the required

capacity and head.

The different material possibilities with uniform dimensions and performance

characteristics as well as the standard exchangeable components, coupling with

mechanical seal, packing gland and cartridge seal make the PSC particularly

recommendable.

The pumps of the PSC /LS series have a retaining stage to avoid the dry running by

controlling the liquid level in the pump. This design is especially developed for the

handling of liquids under vapour pressure or when pumping from underground tanks.

PSC 1000 - 6000

INLET

OUTLET

Model: PSC (With Cartridge Mechanical Seal)

Model: PSC (With Mechanical Seal)

Model: PSC (With Liquid Sensor)

Model: PSC (With Packing Gland)

This impeller allows PSC Pumpsto handle NPSH requirements of

less than 0,5 meter.

Sealing options available are Packing Gland,

Mechanical Seal or Cartridge Seal.

Flanges options available are

DIN and ANSI 150 & 300 norms.

Side Channel allows for greater pressure generation per stage

over normal centrifugal pump of the same size and speed

PSC Model Pumps

PSC ModelDimensional Drawing of Bare Shaft Pump

E

F

J

H

B

C

DG

OUTLET

INL

ET

KL

S

ÿ Zÿ Yÿ X

ÿ V

ÿ T

ÿ U

R

B2

B1

B3

PNM

Flange dimensions in accordance with PN40 DIN 2545 at standard pumps. (upon request ANSI 150&300 norm)

20

32

32

40

50

65

40

65

65

80

100

100

1000

2000

3000

4000

5000

6000

170

200

200

195

237

262

25

40

40

45

50

65

114

134

134

140

160

172

45

60

60

65

65

70

45

50

50

55

60

60

45

53

53

63

68

70

12

14

14

14

16

16

100

112

112

132

160

180

100

135

135

140

165

180

142

180

180

200

220

255

105

135

135

155

170

195

60

110

110

120

120

145

150

185

185

200

235

235

110

145

145

160

190

190

105

140

140

150

165

185

75

100

100

110

125

145

14x4

18x4

18x4

18x4

18x4

18x8

5

6

6

8

8

10

18.2

21.5

21.5

27.0

31.0

35.5

16

19

19

24

28

32

14

16

16

16

18

18

18x4

18x8

18x8

18x8

22x8

22x8

Dimensions [mm]

Pu

mp

In

let

Pu

mp

Siz

e

Pu

mp

Ou

tle

t

D G H RLK M N P T U V X Y Z B1A B C B2 B3S

KgE F J Kg Kg Kg Kg Kg Kg KgE E E E E E EF F F F F F FJ J J J J J J

Number of Stage

1 6 7 82 3 4 5

Dimensions and Weights According to Stage Numbers

1000

2000

3000

4000

5000

6000

365

415

415

463

542

600

399

455

455

518

617

688

206

228

228

260

315

358

195

213

213

268

305

338

20

33

33

46

69

99

22

36

36

53

80

115

24

39

39

60

91

131

26

42

42

67

102

147

28

45

45

74

113

163

30

48

48

81

124

179

32

51

51

88

135

195

34

54

54

95

146

211

240

268

268

315

390

441

274

308

308

370

465

529

229

253

253

323

380

426

433

495

495

573

692

776

263

293

293

378

455

514

308

348

348

425

540

617

467

535

535

628

767

864

297

333

333

433

530

602

342

388

388

480

615

705

501

575

575

683

842

952

331

373

373

488

605

690

376

428

428

535

690

793

535

615

615

738

917

1040

365

413

413

543

680

778

410

468

468

590

765

881

569

655

655

793

992

1128

399

453

453

598

755

866

444

508

508

645

840

969

603

695

695

848

1067

1216

433

493

493

653

830

954

Pu

mp

Siz

e

Dimensional Drawing

1120

9110

9120

9130

9502

0241 0242

1160

1150

2810 9501

1130

4440

9170

1280

4140

9870

7210

9500

2200

7220

4145

7230

3320

1195

2815

9140

24601170

2410

2490

Impeller Bushing

Vane Impeller Bushing

Suction Casing

Discharge Casing

Suction Body

Discharge Body

Impeller Body

Mechanical Seal Casing

Bearing Casing

Shaft

Impeller

Vane Impeller

Hexagonal Shaft Nut (Left-Hand Thread)

Stage O-Ring

Mechanical Seal Casing O-Ring

Ball Bearing

Lip Seal (Inner)

Lip Seal (Outer)

Mechanical Seal

Snap Ring for Shaft

Snap Ring for Bearing

Snap Ring for Lip Seal

2460

2490

2810

2815

3320

4140

4145

4440

7210

7220

7230

Tie Bolt

Tie Bolt Nut

Tie Bolt Washer

Screw for Bearing Casing

Screw for Mechanical Seal Casing

Flat Key for Coupling

Flat Key for Vane Impeller

Flat Key for Impeller

Grease Fitting

9110

9120

9130

9140

9170

9500

9501

9502

9870

0241

0242

1120

1130

1150

1160

1170

1195

1280

2200

2410

ParÁa AdıPart List Part List Part ListItem Item Item

PSC ModelSpare Part List of Pump with Mechanical Seal

Spare Part List

PSC 2001-2008 Sizes Performance CurvesPSC 1001-1008 Sizes Performance Curves

1)2)

1 Stage pump can not be ordered with liquid sensor.8 Stage pump with liquid sensor is produced upon request

2007

2008 2)

2006

2005

2004

2003

2002

20011)

0

1

2

P(kW)

0

200

100

H(m)

3001450 rpm

0

0,2

3)NPSH(m)

1 2 3 Q3(m /h)

4 5

20011)

2002

2003

2004

2005

2006

2007

2008 2)

1 2 3 4 5

1 2 3 4 5

3

4

5

6

7

50

150

250

1007

1008 2)

100610051004

1003

1002

10011)

10011)

1002

1003

1004

1005

1006

1007

1008 2)

0

1

2

1.5

0.5

3

P(kW)

0

100

50

H(m)

150

200 1450 rpm

0

0,2

0,4

0,6

3)NPSH(m)

0 1 2 30,5 1,5 2,5Q3(m /h)

0

0

1

1

2

2

3

3

0,5

0,5

1,5

1,5

2,5

2,5

Performance Curves

1)2)



3008 2)30073006

3005

3004

3003

3002

3001 1)

3008 2)30073006

3005

3004

3003

3002

3001 1)

50

150

4007

4008 2)

4006

4005

4004

4003

4002

40011)

0

2

P(kW)

0

200

100

H(m) 1450 rpm

0

0,5

3)NPSH(m)

6 Q3(m /h)

40011)

4002

4003

4004

4005

4006

4007

4

6

8

10

12

7 8 9 10 11 12 13

150

50

6 7 8 9 10 11 12 13

6 7 8 9 10 11 12 13

4008 2)

Performance Curves


H(m)

P(kW)

NPSH(m)

300

0

50

20 25 30

200

40

0,5

30

1450 rpm

100

20

10

0

15 35Q

(m3/h)

0

6008 2)

60011)

6002

6003

6004

6005

6006

6007

6008 2)

60011)

6002

6003

6004

6005

6006

6007

20 25 3015 35

20 25 3015 35

50

150

250

1450 rpmH(m)

P(kW)

3)NPSH(m)

300

0

200

0,5

30

100

20

10

0

12 14 16 1810 20Q

(m3/h)

0

12 14 16 1810 20

12 14 16 1810 20

50011)

5002

5003

5004

5005

5006

5007

50082)

50011)

5002

5003

5004

5005

5006

5007

50082)

50

150

250

15

5

25

1)2)


Performance Curves

This double bearing design isproduced for heavy duty applications


over normal centrifugal pump of the same size and speedSealing options available are Packing Gland,




Model: PSD (With Mechanical Seal) Model: PSD (With Packing Gland)

PSD Model Pumps

Side Channel Pumps - type PSD

Pumps of the series PSD are horizontal and self-priming, side

channel pumps of segmental type construction which are able

to handle entrained gases.

These pumps have been specifically designed for heavy duty

applications within industry. When pumping pure, turbid or

aggressive media the design is ideally suited.

The range comprises of six sizes each with 1 to 8 hydraulic

stages where by an optimum rating is obtained, ensuring the

pump selected meets the required capacity and head. PSD is a

Side Channel pump operates at a low noise level.

OUTLET

INLET

PSD 1000 - 6000

20

32

32

40

50

65

20

32

32

40

50

65

1000

2000

3000

4000

5000

6000

170

200

200

195

237

262

25

40

40

45

50

65

112

134

134

140

160

172

45

65

65

70

70

70

45

65

65

70

70

70

140

160

160

147

182

197

12

14

14

14

16

16

100

112

112

132

160

180

100

132

132

140

165

180

142

180

180

200

220

260

105

135

135

155

170

195

60

110

110

120

120

145

105

140

140

150

165

185

75

140

140

150

165

185

5

6

6

8

8

10

18.2

21.5

21.5

27.0

31.0

35.5

16

19

19

24

28

32

14

16

16

16

18

18

14x4

18x4

18x4

18x4

18x4

18x8

Dimensions [mm]

Pu

mp

In

let

Pu

mp

Ou

tle

t

D G H QLK M N P T U V B1A B C B2 B3SPu

mp

Siz

e

1000

2000

3000

4000

5000

6000

432

506

506

500

594

669

232

280

280

270

330

384

122

146

146

159

175

210

23

41

41

47

73

103

432

506

506

555

669

757

232

280

280

325

405

472

122

146

146

214

250

298

23

42

42

54

84

119

466

546

546

610

744

845

266

320

320

380

480

560

156

186

186

269

325

386

25

45

45

61

95

135

500

586

586

665

819

933

300

360

360

435

555

648

190

226

226

324

400

474

27

48

48

68

106

151

534

626

626

720

894

1021

334

400

400

490

630

736

224

266

266

379

475

562

29

51

51

75

117

167

568

666

666

775

969

1109

368

440

440

600

705

824

258

306

306

434

550

650

31

54

54

82

128

183

602

706

706

830

1044

1197

402

480

480

655

780

912

292

346

346

489

625

738

33

57

57

89

139

199

636

746

746

885

1119

1285

436

520

520

710

855

1000

326

386

386

544

700

826

35

60

60

96

150

215

1 6 7 82 3 4 5

FE KgJ F FE EKg KgJ JKgE F J Kg Kg Kg KgE E E EF F F FJ J J J


Number of Stage

Pu

mp

Siz

e


OUTLET INLET

F C

E

G

H AJ

D

B

B2

B1

B3

LK

M

Q

S

ÿ Vÿ Uÿ T

P

Dimensional Drawing

PSD ModelDimensional Drawing of Bare Shaft Pump


Discharge Casing

Suction Casing

Suction Body

Discharge Body


Bearing Casing

Shaft

Vane Impeller

Stage O-Ring


Ball Bearing

Lip Seal (Inner)

Lip Seal (Outer)

Dust Seal

Mechanical Seal (Turn Right)

Mechanical Seal (Turn Left)

Snap Ring for Shaft



2815

3320

4140

4145

4150

4440

4450

7210

7220

7230

Tie Bolt

Tie Bolt Nut

Tie Bolt Washer





Grease Fitting

9110

9120

9130

9140

9170

9500

9501

9870

0242

1130

1140

1150

1160

1195

1280

2200

2460

2810

ParÁa AdıPart List Part List Part ListItem ItemItem

4150

9870

4140

1280

9110

9120

9130

1130 0242

1150

1160

2810

9501

7220

7230

3320

9170

1195

2815

9140

4450

2460

1140 4440 9170

1280

4140

9870

7210

9500

2200

9140

2815

1195

3320

7230 7220

4145

Spare Part List

PSD ModelSpare Part List of Pump with Mechanical Seal

Carbon Graphite Bushing

This single bearing design is produced

or medium duty applications


over normal centrifugal pump of the same size and speedSealing options available are Packing Gland,




Side Channel Pumps - type PSV

Pumps of the series PSV are horizontal and self-priming, side

channel pumps of segmental type construction which are able

to handle entrained gases.

These pumps have been specificially designed for medium duty

applications within industry. When pumping pure, turbid or

aggressive media the design is ideally suited.

The range comprises of six sizes each with 1 to 8 hydraulic stages

whereby an optimum rating is obtained, ensuring the pump selected

meets the required capacity and head.

OUTLET

INLET

PSV 1000 - 6000

Model: PSV (With Mechanical Seal) Model: PSV (With Packing Gland)

PSV Model Pumps

1000

2000

3000

4000

5000

6000

362

440

440

424

512

572

232

280

280

270

330

384

122

146

146

159

175

210

23

41

41

43

69

98

362

440

440

479

587

660

232

280

280

325

405

472

122

146

146

214

250

298

23

42

42

50

80

114

396

480

480

534

662

748

266

320

320

380

480

560

156

186

186

269

325

386

25

45

45

57

91

130

430

520

520

589

737

836

300

360

360

435

555

648

190

226

226

324

400

474

27

48

48

64

102

146

464

560

560

644

812

924

334

400

400

490

630

736

224

266

266

379

475

562

29

51

51

71

113

162

498

600

600

699

887

1012

368

440

440

545

705

824

258

306

306

434

550

650

31

54

54

78

124

178

532

640

640

754

962

1100

402

480

480

600

780

912

292

346

346

489

625

738

33

57

57

85

135

194

566

680

680

809

1037

1188

326

520

520

655

855

1000

326

386

386

544

700

826

35

60

60

90

146

210

1 6 7 82 3 4 5

FE KgJ F FE EKg KgJ JKgE F J Kg Kg Kg KgE E E EF F F FJ J J JPu

mp

Siz

e


Number of Stage


20

32

32

40

50

65

20

32

32

40

50

65

1000

2000

3000

4000

5000

6000

170

200

200

195

237

262

25

40

40

45

50

65

112

134

134

140

160

172

45

65

65

70

70

70

45

65

65

70

70

70

70

95

95

70

100

100

12

14

14

14

16

16

100

112

112

132

160

180

100

132

132

140

165

180

142

180

180

200

220

260

105

135

135

155

170

195

60

110

110

120

120

145

105

140

140

150

165

185

75

140

140

150

165

185

5

6

6

8

8

10

18.2

21.5

21.5

27.0

31.0

35.5

16

19

19

24

28

32

14

16

16

16

18

18

14x4

18x4

18x4

18x4

18x4

18x8

D G H QLK M N P T U V B1A B C B2 B3SPu

mp

In

let

Pu

mp

Ou

tle

t

Pu

mp

Siz

e Dimensions [mm]

OUTLET INLET

F C

E

G

H AJ

D

B

B2

B1

B3

LK

M

QS

ÿ Vÿ Uÿ T

P

17

Dimensional Drawing

PSV ModelDimensional Drawing of Bare Shaft Pump


Discharge Casing Bushing

Discharge Casing

Suction Casing

Suction Body

Discharge Body

Discharge Bushing Casing


Bearing Casing

Shaft

Vane Impeller

Stage O-Ring


Bushing Casing O-ring

Ball Bearing

Lip Seal (Inner)

Lip Seal (Outer)

Mechanical Seal

Snap Ring for Shaft


2460

2810

2815

2830

3320

4140

4145

4440

7210

7220


Tie Bolt

Tie Bolt Nut

Tie Bolt Washer



Screw for Bushing Casing



Grease Fitting

7230

9110

9120

9130

9140

9170

9180

9500

9501

9870

0242

0252

1130

1140

1150

1160

1190

1195

1280

2200

ParÁa AdıPart List Part List Part ListItem Item Item

0252

9110

9120

9130 1130

0242

1150

1160

2810

9180

1190

2830 2460

7220

3320

7230

4145

9140 1195

2815

2200

9500

7210

9870

4140

1280

9170

4440

1140

9501

Spare Part List

PSV ModelSpare Part List of Pump with Mechanical Seal

Model No: PSC 3008 Underground Tank Application Model No: PSC 3008 Underground Tank Application

Model No: PSC 2004 Skid System Application for LPG Model No: PSC 5006 Skid System Application Road

Tanker Unloading Pump

Applications

�

�

�

�

�

�

�

�

LPG transfer

LPG Auto Gas Station

Skid Systems

Cylinder filling

Refrigerants

Low density hydrocarbons

Liquefied gasses

(HFC-12, HFC-22, HFC-134A, HFC-410A etc.)

(Pentane, Butane, Isobutane,

Propan etc.)

(DME, Hexane etc.)

Oil Filling Plants (Vegetable and animal oils etc.)

Model No: PSC 5008 / Capacity 20 m/h 20 Bar3

Model No: PSC 6008 / Capacity 35 m/h 20 Bar3

LPG Storage Tanks Application

LPG Filling Plants Application

Oil Filling Plants

Applications

By-Pass models and technical specifications.

By-Pass Type

PB 25

PB 40

PB 50

BSP NPT

Max. OperatingPressure

ConnectionType

1î

1½î

2î

By-PassInlet-Outlet

15 BAR

(217.5 psi)

PB 32 1ºî

By-Pass Type

PBF 32

PBF 50

PBF 65

BSP NPT


ConnectionType

1½î

2î

By-PassInlet-Outlet

15 BAR

(217.5 psi)

PBF 40

1ºî

2½î

Special

Flange

Application

Upon

Request

By-Pass Type

PC 25

PC 40

PC 50

BSP NPT


ConnectionType

1î

1½î

2î

By-PassInlet-Outlet

15 BAR

(217.5 psi)

PC 32 1ºî

Technical Specifications and Models of PB Series By-Pass valves Technical Specifications and Models of PC Series By-Pass valves

Technical Specifications and Models of PBF Series By-Pass valves.

PC Type By-Pass ValvePB Type By-Pass Valve PBF Type By-Pass Valve

Type of By-Pass

VERSA Pump differential by-pass valves are designed to protect pumps and system components from excessive pressure damage.

VERSA Pump by-pass valves can be setted between 0-15 bar.

With only two moving parts, operationis simple and reliable..

By-pass should not be open continuously to protect system against any damage or explosion.

VERSA Pumps can be supplied with or without By-Pass Valves.

ISO 9001-2008

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